package com.dszq.search.Service.Impl;

import com.dszq.model.common.dtos.ResponseResult;
import com.dszq.model.common.enums.AppHttpCodeEnum;
import com.dszq.model.search.dtos.UserSearchDto;
import com.dszq.model.user.pojos.ApUser;
import com.dszq.search.Service.ApUserSearchService;
import com.dszq.utils.thread.AppThreadLocalUtil;
import com.dszq.search.Service.ArticleSearchService;
import org.apache.commons.lang.StringUtils;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.*;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * [一句话描述该类的功能]
 *
 * @author : [Lenovo]
 * @version : [v1.0]
 * @createTime : [2024/4/27 15:23]
 */
@Service
public class ArticleSearchServiceImpl implements ArticleSearchService {
    @Autowired
    private RestHighLevelClient restHighLevelClient;
    @Autowired
    private ApUserSearchService apUserSearchService;
    /**
     * es文章分页检索
     *
     * @param userSearchDto
     * @return
     */
    @Override
    public ResponseResult search(UserSearchDto userSearchDto) throws IOException {
        //1.检查参数
        if (userSearchDto ==null|| StringUtils.isBlank(userSearchDto.getSearchWords()))
        {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        ApUser apUser =  AppThreadLocalUtil.getUser();
        //异步调用 保存搜索记录
        if(apUser != null && userSearchDto.getFromIndex() == 0){
        apUserSearchService.insert(userSearchDto.getSearchWords(),apUser.getId());
        }

        //2.设置查询条件
        SearchRequest searchRequest = new SearchRequest("app_info_article");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //布尔查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
        //关键字的分词之后查询
        QueryStringQueryBuilder queryStringQueryBuilder = QueryBuilders.queryStringQuery(userSearchDto.getSearchWords()).field("title").field("content").defaultOperator(Operator.OR);
        boolQueryBuilder.must(queryStringQueryBuilder);

        //查询小于mindate的数据
        RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery("publishTime").lt(userSearchDto.getMinBehotTime().getTime());
        boolQueryBuilder.filter(rangeQueryBuilder);
        //分页查询
        searchSourceBuilder.from(0);
        searchSourceBuilder.size(userSearchDto.getPageSize());
        //按照发布时间倒序查询
        searchSourceBuilder.sort("publishTime", SortOrder.DESC);
        //设置高亮  title
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        //高亮三要素
        highlightBuilder.field("title");
        highlightBuilder.preTags("<font style='color: red; font-size: inherit;'>");
        highlightBuilder.postTags("</font>");
        searchSourceBuilder.highlighter(highlightBuilder);

        searchSourceBuilder.query(boolQueryBuilder);
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);


        //3.结果封装返回
        List<Map> mapList = new ArrayList<>();
        SearchHit[] hits = searchResponse.getHits().getHits();
        for (SearchHit hit : hits) {
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            if(hit.getHighlightFields()!=null&&hit.getHighlightFields().size()>0)
            {
                Text[] titles = hit.getHighlightFields().get("title").getFragments();
                String title = StringUtils.join(titles);
                //高亮标题
                sourceAsMap.put("h_title",title);
            }else {
                //原始标题
                sourceAsMap.put("h_title",sourceAsMap.get("title"));
            }
            mapList.add(sourceAsMap);
        }
        return ResponseResult.okResult(mapList);
    }
}
